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3 years ago

If equations are not balanced,what must you do?

1 answer:

3 0

If a chemical equation is not balanced it implies that either mass has been created or destroyed which is a contradiction to law of conversation of mass which states that matter can niether be created nor destroyed.

In order to balance the chemical equation, you need to make sure the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal.

- BRAINLIEST answerer ❤️✌

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17. The correct arrangement of the following elements in order of

tatuchka [14]

Answer:

Got your back

Explanation:

If the ions derived from different atoms are isoelectronic species, then they all have same number of electrons in their electronic shells and will have got same electronic configuration but their nuclear charge will differ because of their difference in number of protons in the nucleus. With increase in number of protons in the nucleus the electrons are more attracted towards nucleus thereby causing the decrease in ionic radius. On this principle our problem will be solved

The given ions are

7N-3

→no. of proton

and

no of electron

=10

8O-2

→

no. of proton

and

no of electron

=10

9F-→

no. of proton=9

and no of electron=10

11Na→

no. of proton=11

and no of electron=10

12 Mg-3→

no. of proton=12 and

no of electron=10

Hence the increasing order of ionic radius is

12Mg-3<11Na+<9F-<8O-2<7N-3

To rmember ->For isoelectronic species lower the nuclear charge higher the radius

8 0

3 years ago

I NEED HELPPP THIS DUE TODAY!!!! IT IS URGENT!!

Volgvan

Answer:

I don't really get what were supposed to be answering. if you give us a more clear question, it will be easier to answer! :)))

5 0

3 years ago

Calculate the atomic mass of silicon. The three silicon isotopes have atomic mass and relative abundances of 27.9769 amu (92.229

eduard

Nolur acil lütfen yalvarırım yalvarırım lütfen yalvarırım sana

8 0

3 years ago

Write a nuclear equation for the fusion of two h−2 atoms to form he−3 and one neutron.

Svet_ta [14]

'Heavy' hydrogen (the isotope deuterium) , 2/1H is involved ,

[2= mass number, 1= atomic (proton) number]

2/1H + 2/1H → 3/2He + 1/0n

6 0

3 years ago

Which one of the following statements is correct? A. A pure substance may be separated by filtration or distillation into two or

torisob [31]

Answer: Option (D) is the correct answer.

Explanation:

A pure substance is defined as the substance that is made up of only one type of atom or only one type of molecule.

For example, $Cl_{2}$ is a molecule and it is a pure substance.

Also, substances that contain two or more different element which are chemically combined in a fixed ratio by mass are known as compounds. They are also pure substances.

A pure substance can only be separated by a chemical method and not by any physical method.

A heterogeneous mixture is defined as the mixture which contains non-uniform composition of solute particles into the solution.

For example, mud dissolved in water.

It is not necessary that two or more substance present in a heterogeneous mixture should be of same phase.

Also, it is not necessary that combination of a liquid and a solid always results in a heterogeneous mixture.

If the solid is able to dissolve completely into the liquid then it will result in a homogeneous mixture.

Whereas a homogeneous mixture is defined as the mixture which contains uniform distribution of solute particles into the solvent.

For example, salt dissolved in water is a homogeneous mixture.

Thus, we can conclude that the statement composition is uniform throughout a homogeneous mixture, is correct.

4 0

3 years ago